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Is four vital capacity breath pre-oxygenation technique useful?: A study

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Original Article

Author Details : Prashant Raosaheb Ginimuge, Chaitanya Kamat

Volume : 3, Issue : 4, Year : 2016

Article Page : 568-571

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Abstract

Background: Many techniques of pre-oxygenation have been proposed and followed world-wide. 3–5 minutes of tidal volume pre-oxygenation is the most preferred technique of choice for pre-oxygenation. This technique may not be feasible in emergency situations. Hence this study was conducted to evaluate the efficacy and utility of four vital capacity breath pre-oxygenation technique, as its less time consuming.
Methods: Fifty American Society of Anesthesiologists grade I and II patients in the age group of 20–40 years were studied under two groups of 25 each. Group I did not receive any pre-oxygenation and group II received pre-oxygenation in the form of four vital capacity breaths in 30 seconds. Rescue breaths with 100% oxygen were administered to all those patients whose oxygen saturation dropped below 75%.
Results: It was observed that after one minute of post induction apnea, patients in group I had a reduction in oxygen saturation to a mean of 79.92±3.328%, in comparison to 87.24±2.368% in group II. It was also observed that vital parameters at the end of 1 min of apnea were close to baseline values in group II. The results were analysed using the "Analysis of Variance" (ANOVA) method.
Conclusions: Pre-oxygenation with four vital capacity breaths does prolong the onset of desaturation and thus can be useful in emergency situations where time is precious.

Keywords: Pre-oxygenation, Oxygen saturation, General anaesthesia, Four vital capacity breaths, Desaturation

How to cite : Ginimuge P R, Kamat C, Is four vital capacity breath pre-oxygenation technique useful?: A study. Indian J Clin Anaesth 2016;3(4):568-571

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